Spraying device for rock-drills.



W. J. BARNBTTL SPRAYING DEVICE FOR ROCK DRILLS. v

APPLIO'lTION `FILED JUNE 13, 1907.

W-WM y Panted Apr. 26, 1.910. I'

WILLIAM JAMES BARNETT, OF GERMISTON, TRANSVAAL.

SPRAYING DEVICE FOR ROCK-DRILLS,

Specification of Letters Patent'.

Application filed June 13, 1907.

Serial No. 378,779. y

To all whom it may concern.'

f Be it known that I, WILLIAM J AMES BAR- NETT, a subject of the King of Great Britain, residing at the Jupiter Gold Mining Company, Germiston, in the Colony of the Transvaal, have invented certain new and useful Improvements in Spra ing Devices for RoclrDrills, of which the tollowing is a specification. Y

The present invention relates to 'that class of devices which are used in conjunction with rock-drilling machines to discharge a jet of spray for the purpose of allaying the dust produced in drilling.

Such devices have hitherto either been entirely dissociated from the drilling machine or they have been distinct entities which 'have been screwed to or otherwise merely attached to the machine.

The device is liable in the former case to be lost, and in the latter case to be damaged during handling of the machine, constituting as it does an inconvenient projection upon the latter. f

t is the object of the present invention to overcome these defects by embodying the device in an essential part of the machine, and at the saine time to provide a spray producer of cheap and simple construction.

convenient form oi the invention is shown in the accompanying drawing in Whichy Figure l is a longitudinal section through the front part of the valve-chest of a Welllrnown type of drilling` machine, and F ig. li is a face view ot' the front cover of such chest partly in section.

in the machine here illustrated the front end of the valve-chest ais occupied by a metal plate supported by a rubber buffer c, and consequently such end is cut oil from the air in the valve-chest. Moreover the butler c is perforated with an axial hole d.

e indicates the front cover of the air chest and f an air supply port to the valve-chest.

ln adapting such existing structure to-conform with this invention, the front cover e of the valve-chest is bored out centrally to form a chamber' g of conical shape at the front part and terminating in a relatively small aperture The rear part j of suc chamber y is tapped and into 1t is screwed an air nozzle 7c. Such air nozzle is bored axially at Z and has a notch m to enable it to b'e manipulated by means of a screw-driver.

n is an air port drilled in from the front of the chest to connect with the main air supply port f. Such port 'n is controlled b a valve o having a screwed shank p Whic Works 1n a tappedv hole g in the cover e. Said shank is 'of such length that it does not project beyond the front' face of the cover; and itis formed with anotch r or other convenient means by which vit may be rotated by a suitable instrument inserted 'into the hole g. The valve pro r is made slightly larger than the screwe yshank ,foto obviate, shaking out and possible loss of the part. A passage a is cut through the buffer c to'conduct air from the valve to the bore d and so to the nozzlek.

F or supplying Water to the chamber ga Patented Apr. 26, 1910.

hole is bored into the same from, the side of the cover, and is fitted with a ni ple u to which to attach a hose. Such nipp e is sunk in a recess o in order that it may receive the hose Without itself projecting substantially from tbecover. l f

Upon ,commencing to drill a dry hole, the' valve 0 is opened and the air issuing from the nozzleek creates a partial vacuum in the chamber g. Water being thereby drawn from a convenient supply through the hose attached to the nipple u and into the chamber g, is ejected therefrom'tlirough the aperture i in the form of spray-and impin es aty 4` and around the mouth of the holev eing bored, thereby preventing the diffusion of rocky particles into the air.

By adjusting the position of the nozzle k in the chain-ber g, the character of the spray produced-may be regulated as desired.

it is 't'o be remarked that While the inventionhat only been described as applied to existing drilling machines of a particular type,A t e actual details of constructionmay' be considerably varied, more particularly when applying it to existing machines of a different type or when designing new machines to embody it.

I claim as my invention L'In a-rock drilling machine', a valve chest, a front cover for said valve chest hav. ing formed in it a chamber, said chamber having an opening for affording a passa e to the outer surface of the cover, a nozlz e located axially in said chamber, means lying, Wholly Within said valve chest and communieating with said nozzle for supplying air to said chamber, means adjustable 1n said front ,110

chamber, an

. front o the valve-chest having formed in it a chamber, said chamber having a conical front portion and having also a relatively small opening to vthe front face of the cover, an adjustable air nozzle located axiall in said chamber, means for conveying air rom the main air port to the air nozzle, means shielded by the cover for regulating the air supply to the nozzle, 'and means for supplying Water to the chamber.

3. In a rockdrilling machine and in combination, a valve-chest having a main air supply ort formed therein, aA cover for the front o the valve-chestlhaviing formed in it a chamber, said chamber having a conical .front portion and 'having also a relatively 'small opening to the front face of the cover,

an adjustable air nozzle located axially in said chamber, means for conveying air from the main 'air port to the air. nozzle, means shielded by the cover for regulating the air supply to the nozzle, a Water supply passage leading to the'f'chamber and a hose nipple associated therewith, such nipple being sunk in a recess formed in the cover.

4. In a `'rock drilling machine, the combination with the valve chest having a main air supply port formed therein, of a cover eoaoae for the front of the valve chest having formed in it a chamber, said chamber having an opening to the front faeeof the cover, a plate closingsaid valve chest adjacent said cover, a buffer arranged between said plate and said cover said buer having an air duct formed therein and-communicatm with the chamber in said cover, an air supp y passage communicatin between said mam air supply port and sai air duct in the buer, and means for supplying Water to the chamber, substantially as described.

5. In a rock drilling machine, a valve chest, a yfront cover therefor having formed in it a chamber said chamber having an opening for affording aA passage to the outer surface of the cover, said front cover being further provided with a recess atits outer surface and a passage of smaller diameter than said recess connecting the latter with said chamber, an air nozzle located axially insaid chamber, an air supply passage lying Wholly Within said valve chest and connect-4 ing With said air nozzle, an adjustable valve for controlling the air supply to said air nozzle, and means adapted for insertion into said recess for supplying ,Water to said chamber, substantially as described.

In testimony whereof I ax my signature in presence of tWo Witnesses.

' WILLIAM JAMES BARNE'IT.

Witnesses: f

ALFRED L. SPQOR, J. WARREN DENNINP' eoV 

